9 research outputs found

    Computer Simulation Development of Hydro-cyclone Performance in Solid Liquid Separation

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    The separation of particle and fluid using device called hydro-cyclone has been widely adapted in various industry especially oil and gas field. The solids mainly the sand flow out from the well with the oil need to be separated out before the oil can be flown to the production facility as sand can corrode the equipment and lead to higher cost consumption for the production. In oil field, the produced crude from the well may vary in the properties especially the density and the viscosity. The two properties are among the properties that will influent the separation performance of the hydro-cyclone. However, significant of the relation between these parameters to the separation efficiency is unclear and to investigate it experimentally will be expensive and time consuming

    THE SPILLOVER EFFECTS OF FOREIGN DIRECT INVESTMENT ON DOMESTIC ENTERPRISES IN SAVANNAKHET PROVINCE, LAOS

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    The objective of this study is to examine the spillover effects of foreign direct investment (FDI) on domestic firms in Savannakhet province, Laos. The author uses the fixed effects model (FEM) and the random effect model (REM) with the help of Eviews software and Hausman test to analyze the spillover effects of FDI on domestic firms. in Savannakhet province in the period 2013-2018. Table I-O 2018 is used to structure the relationship between domestic firms and FDI enterprises through the horizontal and vertical spillover effect of FDI on domestic firms. With the data set of sectors from 2013 to 2018, the author estimated the impact of FDI on production and business activities of FDI enterprises. The result of this study is that there is empirical evidence of the effect of the spillover effect of FDI on domestic firms in Savannakhet province

    The evaluation of control measures against Schistosoma mekongi in Cambodia by a mathematical model

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    We constructed a mathematical model for the transmission of Schistosoma mekongi in Cambodia. The simulation of the model will be instrumental in planning schistosomiasis control measures. The model includes two definitive hosts, humans and dogs, as animal reservoirs. Dogs are recognized to play an important role in schistosomiasis transmission in Cambodia. For the purpose of dealing with age-specific prevalence and intensity of infection, the human population was classified into eight age categories in the model. To describe the seasonal fluctuation of the intermediate host population of S. mekongi, the "Post-Spate Survival" hypothesis was adopted for the population dynamics of Neotricula aperta present in the Mekong River. We carried out simulations to evaluate the effect of universal treatment (UT) and targeted mass treatment (TT) with praziquantel on the reduction in prevalence of S. mekongi. The simulations indicated that biyearly UT for 8 years or yearly TT for 5 years after three courses of yearly UT could reduce the prevalence to below 5% when a UT or TT coverage of 85% of inhabitants was achieved. The simulation suggested that the suppression of S. mekongi in Cambodia would be possible by UT or TT with a high coverage rate.</p

    Analysis of the effectiveness of control measures against Schistosoma mekongi using an intra- and inter-village model in Champasak Province, Lao PDR

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    Schistosomiasis mekongi is prevalent in the Khong district of Lao PDR, made up of one big island. Khong, and numerous small islands in the Mekong River. Schistosoma mekongi is spread by Neotricula aperta as the intermediate host along the Mekong River. Therefore, even if an epidemic of S. mekongi were stamped out in a certain village, infection may recur if the source of infection is a village located in the upper reaches of the Mekong River. The purpose of this study was to construct a mathematical model for the transmission of S. mekongi among villages from the upper to lower Mekong River to estimate the effect of control measures against it. The chief characteristic of the present model is competence in dealing with the spread of infection among villages through the Mekong River in consideration of the reduction in longevity of cercariae and miracidia and their diffusion in the river. The model also takes into account seasonal fluctuation in the water level of the Mekong River, which affects human behavior in terms of water contact. The results of simulations indicated that the prevalence of schistosomiasis mekongi would be suppressed to a low level for a long time in a village further downstream when universal mass treatment is performed in villages further upstream simultaneously

    SLAVERY: ANNUAL BIBLIOGRAPHICAL SUPPLEMENT (2005)

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